Description

Springfield Saint 5.56mm Semi-Automatic AR-15 Rifle with M-Lok Rail

Overview

The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail represents a direct evolution of the American service rifle platform, engineered for shooters who demand reliability and accuracy from a factory-built carbine. Chambered in 5.56mm NATO, this rifle delivers consistent performance across a wide range of ammunition types, from standard ball to defensive loads. The M-Lok free-float handguard provides a stable mounting platform for accessories while reducing overall weight. Springfield Armory has refined this model to meet the expectations of both tactical operators and competitive shooters, offering a ready-to-use platform that requires no immediate upgrades. The gas-impingement operating system has been tuned for reliable cycling with suppressed and unsuppressed fire, making this a versatile choice for various shooting disciplines.

Features & Specs

The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail is built around a forged 7075 T6 aluminum lower receiver and a 4150 chrome-moly vanadium steel barrel with a 1:8 twist rate. This barrel profile balances weight and heat dissipation for sustained firing sessions. The M-Lok rail system extends to 15 inches, allowing for maximum accessory placement without interfering with gas block clearance. The rifle includes a B5 Systems pistol grip and collapsible buttstock, providing ergonomic control across different shooter sizes. The bolt carrier group is shot-peened and MPI-tested for longevity under high-round-count use. The two-stage trigger offers a clean break at approximately 4.5 to 5 pounds, reducing shooter-induced error during precision shots.

• Barrel: 16-inch 4150 CMV with Melonite finish, 1:8 twist, M4 feed ramps
• Handguard: 15-inch free-float M-Lok aluminum rail with continuous top Picatinny
• Operating system: Direct impingement with pinned low-profile gas block
• Weight: 6 pounds 12 ounces unloaded with standard furniture
• Finish: Hard-coat anodized black on receivers, Melonite on barrel

Who It’s For

This rifle is designed for three primary user groups: law enforcement professionals requiring a duty-ready patrol carbine, competitive shooters entering 3-Gun or tactical matches, and civilian owners seeking a home defense or ranch rifle with proven reliability. The Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail suits shooters who prefer a factory-complete firearm without the need for aftermarket customization to achieve combat accuracy. It also serves experienced shooters who want a second platform for training or as a backup rifle in a multi-gun rotation. The adjustable stock and low-profile gas block accommodate users wearing body armor or shooting from unconventional positions. New AR-15 owners will appreciate the intuitive controls and familiar manual of arms that mirror military-spec carbines.

• Duty use: Patrol, security, and tactical response applications
• Competition: 3-Gun, two-gun, and tactical rifle divisions
• Personal defense: Home protection and rural property security

Shipping & FFL

All orders for the Springfield Saint 5.56mm semi-automatic AR-15 rifle with M-Lok rail require shipment to a Federal Firearms License (FFL) holder in your state of residence. Before placing your order, confirm that your chosen FFL dealer is willing to accept transfers for this firearm. After your order is placed, provide the dealer’s FFL information through your account or by email. We ship via insured carrier with signature required upon delivery. Shipping costs are calculated at checkout based on your location and selected service level. Some states and localities impose additional restrictions on semi-automatic rifles; it is your responsibility to verify compliance with all applicable laws before purchase. We do not ship to P.O. boxes for firearm deliveries. Standard processing time is 1 to 3 business days after FFL verification, with transit times varying by destination.

• Shipment method: Insured carrier, adult signature required
• Processing: 1-3 business days after FFL documentation received
• Restrictions: Buyer must comply with all federal, state, and local laws